Neutron scattering measurements of magnetic excitations in Gd/Y superlattices

Grünwald, A. T. D.; Wildes, A. R.; Schmidt, W.; Tartakovskaya, E. V.; Nowak, G.; Theis-Bröhl, K.; Schreyer, A.
May 2010
Applied Physics Letters;5/10/2010, Vol. 96 Issue 19, p192505
Academic Journal
Neutron inelastic scattering has been used to measure the magnetic excitations as a function of applied magnetic field in an antiferromagnetically coupled Gd/Y superlattice. The excitations were measured along the c-axis, which is parallel to the normal of the interfaces and the sample growth direction. Dispersive spin waves were unambiguously detected on the application of a magnetic field. The spin waves are shown to renormalize with field following a basic model drawn from standard spin wave theory. The model required no free parameters aside from an initial amplitude.


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